Home / 8,428.16-11,631.52-4,702.72

Finding the Fourth Proportional to 8,428.16, 11,631.52 and 4,702.72

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Solution

The fourth proportional to 8,428.16, 11,631.52 and 4,702.72 is: 6,490.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.16 : 11,631.52 = 4,702.72 : x
  2. Step 2: Convert to fraction form
    8,428.16/11,631.52 = 4,702.72/x
  3. Step 3: Cross multiply
    8,428.16x = 11,631.52 × 4,702.72
  4. Step 4: Simplify right side
    8,428.16x = 54,699,781.73
  5. Step 5: Solve for x
    x = 54,699,781.73/8,428.16
  6. Step 6: Final answer
    x = 6,490.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.